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papalek
Joined: 08 Mar 2006
Posts: 1536
Location: Longs SC
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| Posted: Fri May 16, 2008 2:07 pm Post subject: My first HVPS failure. |
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My AmPro 4600 sarted having some issues with HVPS restarts. Then they cleared up after taking it apart and resoldering some things and putting a small fan on the side of it.
Then it started to act really weird. After about 2 -3 minutes after turning it on it would turn blurry for a bit then go black and then instantly come back on clear. It would do this a few times and would be perfect for the rest of the night,even if it was 5-6 hours. The HVPS restart counter did not go up. A couple of days ago it started to turn blurry and change size. It would shrink in about 6 to 10 inches all the way around and pulse small and large for a bit then black out. It done that for about 5 minutes then worked right. Last night when I turned it on it would start to show the image and go straight into a HVPS restart. It would do that for about 3 or 4 times and then turn off. I tried several times and it just would not fire up.
I put in the HVPS from my backup 4600 after swapping my little fan over and it is running fine.
Does anyone have any ideas as to how I might be able to fix it so I will have a backup again?
By the way this is the FIRST AmPro HVPS failure that I have had. And I have been running AmPros for about 8 years now.
_________________
My current list of PJ's AmPro 1 1/2-4600,4200, 1/2-3600,2600.
I do love my AmPro's
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Fri May 16, 2008 2:10 pm Post subject: |
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Check all solder joints on the sub board and the module contacts. Could be internal HV arcing though, in which case it's toast.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Fri May 16, 2008 4:12 pm Post subject: Re: My first HVPS failure. |
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| papalek wrote: | My AmPro 4600 sarted having some issues with HVPS restarts. Then they cleared up after taking it apart and resoldering some things and putting a small fan on the side of it.
Then it started to act really weird. After about 2 -3 minutes after turning it on it would turn blurry for a bit then go black and then instantly come back on clear. It would do this a few times and would be perfect for the rest of the night,even if it was 5-6 hours. The HVPS restart counter did not go up. A couple of days ago it started to turn blurry and change size. It would shrink in about 6 to 10 inches all the way around and pulse small and large for a bit then black out. It done that for about 5 minutes then worked right. Last night when I turned it on it would start to show the image and go straight into a HVPS restart. It would do that for about 3 or 4 times and then turn off. I tried several times and it just would not fire up.
I put in the HVPS from my backup 4600 after swapping my little fan over and it is running fine.
Does anyone have any ideas as to how I might be able to fix it so I will have a backup again?
By the way this is the FIRST AmPro HVPS failure that I have had. And I have been running AmPros for about 8 years now. |
Oh oh, where's Pete. He would eat that $hit up. 
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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papalek
Joined: 08 Mar 2006
Posts: 1536
Location: Longs SC
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| Posted: Fri May 16, 2008 4:24 pm Post subject: |
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My AmPros have given me a LOT less headaches than the few Barcos that I have Had. The 3600 that I sold my sister has worked flawless. It does not even need a touch up but about once every 6 months.
_________________
My current list of PJ's AmPro 1 1/2-4600,4200, 1/2-3600,2600.
I do love my AmPro's
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XANATOS
Joined: 22 Mar 2006
Posts: 130
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| Posted: Fri May 16, 2008 10:58 pm Post subject: |
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YEA AMPRO 4600 PROJECTORS ARE CRAP JUST THROW THE $HIT OUT
and buy a reliable sony g90 ,at least you know a G90`S going to go down in 3000-5000 hours
with is a good thing that`s also about the time the tubes are brown
a ^%*%* ampro 4600 `s good for 20000-30000 hours from new ,in a home theater you never know when
it`s going to go down
XANATOS
_________________
IN THE LAND OF HOME THEATER
THE THREE EYED MONSTER IS
KING
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sat May 17, 2008 12:03 am Post subject: |
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You know, when the picture gets small that means the HV is increasing in voltage. Not a good thing. Spellmans usually have overly sensitive overvoltage circuits, that's why all the HV restarts. Probably best to not use that supply until you can get it fixed.
Old projector story. Once, Ampro was looking for an alternative to the Spellman power supply and got a prototype from another company. I put it in a unit, connected everything up and turned it on. Fffffft, it came up. Ok, cool. About 15 seconds later the picture got real small and intense looking. Whoa! Before I could turn it off, BAMMMM! The HV arced THROUGH the glass of one of the tube necks to the grounded clamp on the focus magnet. Yeehaw! We didn't buy any of those.
Be careful.
Scott
_________________
"Were we directed from Washington when to sow and when to reap, we would soon want bread."
Thomas Jefferson
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Person99
Joined: 09 Mar 2006
Posts: 4899
Location: Flower Mound, TX
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| Posted: Sat May 17, 2008 12:13 am Post subject: |
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| tse wrote: |
Old projector story. Once, Ampro was looking for an alternative to the Spellman power supply and got a prototype from another company. I put it in a unit, connected everything up and turned it on. Fffffft, it came up. Ok, cool. About 15 seconds later the picture got real small and intense looking. Whoa! Before I could turn it off, BAMMMM! The HV arced THROUGH the glass of one of the tube necks to the grounded clamp on the focus magnet. Yeehaw! We didn't buy any of those.
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You mean you actually found a power supply worse than a Spellman? And to think, most people didn't think that was possible. 
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Dave
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
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papalek
Joined: 08 Mar 2006
Posts: 1536
Location: Longs SC
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| Posted: Sat May 17, 2008 1:06 am Post subject: |
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Scott,
I am not using it anymore but what is it that needs to be replaced in it?
_________________
My current list of PJ's AmPro 1 1/2-4600,4200, 1/2-3600,2600.
I do love my AmPro's
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sat May 17, 2008 1:12 am Post subject: |
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| XANATOS wrote: | YEA AMPRO 4600 PROJECTORS ARE CRAP JUST THROW THE $HIT OUT
and buy a reliable sony g90 ,at least you know a G90`S going to go down in 3000-5000 hours
with is a good thing that`s also about the time the tubes are brown
a ^%*%* ampro 4600 `s good for 20000-30000 hours from new ,in a home theater you never know when
it`s going to go down
XANATOS |
Hey wingnut, I mean XANATOS, Please enlighten us as to how much AmPro exreriance you have, especially with a 4600?
For the record, I'm on my second Focus board, second HVPS AND my second set of tubes. I bought it with 2,200 hours on it and now it has over 16,000 hours on the clock. You my friend are F*****g clueless 
You have been listening to, to many meatheads complain about a projector that they've never seen. Curt has even stated many times that the X600 series does NOT suffer the problems of the older series AmPro's but alas, it falls on deaf ears.
I suppose I should thank people like you for the drivel you spew. It keeps the prices down to a point where I can buy 3 cherry 4600's for the price of 1 5,000hr G-90. So I will,
THANK YOU XANATOS for keeping the price of my projectors and their parts dirt cheap.
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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XANATOS
Joined: 22 Mar 2006
Posts: 130
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| Posted: Sat May 17, 2008 4:36 am Post subject: |
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i believe you missread my post 
the ampro 4600hd is my favorite projector and i have seen them all and owned
most of them
XANATOS
_________________
IN THE LAND OF HOME THEATER
THE THREE EYED MONSTER IS
KING
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sat May 17, 2008 6:16 am Post subject: |
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| Papalek wrote: | | My first HVPS failure. |
Welcome to the club
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Tech support for nothing
CRT.
HD done right!
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Heywood Jablome
Joined: 12 Mar 2006
Posts: 1548
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| Posted: Sun May 18, 2008 11:31 am Post subject: |
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Don't mind Chip... his wing is still F'd up.
_________________
"Those countries which lag behind in industry, in the application of mechanics and technical chemistry, in the careful selection and utilization of natural products, where the respect for such activities does not permeate all classes of society, will unfailingly decline in prosperity. They will sink faster when neighbor states, with an energetic exchange between science and industry, go forward with renewed vitality."
-- Baron Alexander von Humboldt: 1769-1859
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sun May 18, 2008 4:45 pm Post subject: |
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| papalek wrote: | Scott,
I am not using it anymore but what is it that needs to be replaced in it? |
The odd thing is that the supply is not overvoltaging when the output goes high. The overvoltage circuit is very sensitive and seldom misses an opportunity to shut off the output. The OV circuit has its own parts that are seperate from the output regulation circuits. One thing that might cause the output to rise without causing OV is the "overdrive" system. Maybe it is partially turning on?
Scott
_________________
"Were we directed from Washington when to sow and when to reap, we would soon want bread."
Thomas Jefferson
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun May 18, 2008 6:01 pm Post subject: |
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| tse wrote: | One thing that might cause the output to rise without causing OV is the "overdrive" system. Maybe it is partially turning on?
Scott |
Is that when the output get's turned up to 11?
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HD done right!
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